GAS Checkvalve vs GAS Shutoff: specs compared
Updated 05 September 2026.
5
specs differ
GAS Checkvalve and GAS Shutoff differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | GAS Checkvalve | GAS Shutoff |
|---|---|---|
| Designation | 1/4" FFL x 1/4" MFL | 1/4" MPT x 1/4" MFL |
| Size / thread | 1/4" FFL (7/16-20 UNF) inlet and 1/4" MFL (7/16-20 UNF) outlet, or barb ends | 1/4" MPT (1/4-18 NPT) one end, 1/4" MFL (7/16-20 UNF) the other, often with a check valve |
| Fitting form | one-way flare check valve | quarter-turn ball shutoff |
| Seals on | flare faces at each flare end; barb under a clamp on barb versions | NPT end taped on the thread; MFL end on the flare face |
| Rating / role | passes CO2 toward the keg and blocks beer or foam from returning up the gas line | shuts a single gas line without touching the regulator; some carry a check valve too |
Questions and answers
How do GAS Checkvalve and GAS Shutoff compare?
GAS Checkvalve and GAS Shutoff differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.